CHITTAGONG: At least five people were killed and dozens were injured in an explosion at an oxygen plant outside Bangladesh’s port city of Chittagong on Saturday, officials said.

The blast rocked the oxygen unit of the Sheema steel re-rolling mill in the industrial town of Sitakunda at around 4:30 pm (1030 GMT), trapping “many workers” inside the plant, local police chief Tofael Ahmed said.

“The fire brigade has doused the fire and they rescued the people from the plant,” he added.